CN114424004A - Cooling device for superconductor cooling container - Google Patents
Cooling device for superconductor cooling container Download PDFInfo
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- CN114424004A CN114424004A CN202080065822.1A CN202080065822A CN114424004A CN 114424004 A CN114424004 A CN 114424004A CN 202080065822 A CN202080065822 A CN 202080065822A CN 114424004 A CN114424004 A CN 114424004A
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- superconductor
- heat transfer
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- 238000001816 cooling Methods 0.000 title claims abstract description 174
- 239000002887 superconductor Substances 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 239000002826 coolant Substances 0.000 claims abstract description 6
- 238000012546 transfer Methods 0.000 claims description 80
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 48
- 229910052802 copper Inorganic materials 0.000 claims description 48
- 239000010949 copper Substances 0.000 claims description 48
- 238000003466 welding Methods 0.000 claims description 38
- 238000009434 installation Methods 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 9
- 230000037431 insertion Effects 0.000 claims description 9
- 238000005452 bending Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 5
- 230000004927 fusion Effects 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 6
- 239000000470 constituent Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B12/00—Superconductive or hyperconductive conductors, cables, or transmission lines
- H01B12/16—Superconductive or hyperconductive conductors, cables, or transmission lines characterised by cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/006—Thermal coupling structure or interface
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F6/00—Superconducting magnets; Superconducting coils
- H01F6/04—Cooling
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
An invention relating to a cooling device for a superconductor cooling container is disclosed. The disclosed cooling device for a superconductor cooling container is characterized by comprising: an inner container arranged inside the outer container, wherein the superconductor is soaked in the liquid coolant in the inner container; a freezer disposed outside the outer container and generating cold air; and a very low temperature maintaining device connected with the freezer and maintaining the inner part of the inner container in a very low temperature state.
Description
Technical Field
The present invention relates to a cooling device for a superconductor cooling container.
Background
Generally, a cooling cryogenic vessel for cooling a superconductor to an extremely low temperature is fabricated in a cylinder (cylinder) form of a vacuum insulation structure that minimizes heat inflow from the outside. The cooling cryogenic vessel includes: an outer container for keeping a vacuum state; and an inner container disposed inside the outer container for cooling the superconductor to an extremely low temperature.
The superconductor is cooled by immersion in a liquid coolant consisting mainly of nitrogen gas in the inner vessel, at which time a cryogenic freezer is used to cool the liquid nitrogen.
At this time, in order to construct a compact system, natural convection of liquid nitrogen in the gravity direction is generated by attaching a freezer to the side surface (upper portion of liquid nitrogen) of the inner vessel, that is, the nitrogen gas tank, and a circular (ring-shaped) copper tape is welded or brazed (baking) to the outer wall of the inner vessel (nitrogen gas tank) in order to secure temperature uniformity in the circumferential direction of the nitrogen gas tank. In particular, the copper strip is rounded by rolling a copper plate of a predetermined thickness and milling a concave surface contacting the outer wall of the nitrogen gas tank.
However, in the conventional process of manufacturing a copper strip, as the size of the inner container increases, the difficulty of manufacturing the copper strip increases and the manufacturing cost gradually increases, and there is a problem that the size of a vacuum furnace (vacuum furnace) for heating is limited when performing brazing.
In addition, since the inner side surface of the copper strip and the outer side surface of the inner container are bonded by using solder in the conventional technique, it is difficult to confirm the welding or soldering state of the copper strip bonded to the inner side surface and the outer side surface of the inner container, and it is difficult to control the quality because the heat transfer efficiency is remarkably lowered in the case of abnormal bonding.
Therefore, there is a need to improve this.
As related background art, there is Korean patent laid-open publication No. 1046323 (2011.06.28, title of the invention: very low temperature cooling method and apparatus for high temperature superconductor devices).
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above-mentioned needs, and it is an object of the present invention to provide a cooling device for a superconductor cooling container, which is capable of uniformly transferring cold air of a refrigerator to an inner container by forming a plurality of installation surface portions on a peripheral edge of the inner container by a surface processing, respectively installing a plurality of heat transfer members on the installation surface portions, and connecting the heat transfer members to each other using a copper flexible member, thereby omitting a conventional copper tape and saving manufacturing costs, and easily confirming a contact state and management quality of the heat transfer members.
Another object of the present invention is to provide a cooling apparatus for a superconductor cooling vessel, which can ensure uniform cooling performance over the entire circumferential periphery by omitting a conventional copper tape and separately manufacturing an intermediate body for installing a cooling belt, which is a cryogenic temperature maintaining device, by bending a steel sheet, and which can reduce the difficulty of work and improve the workability, thereby saving the manufacturing time and cost.
Means for solving the problems
In order to achieve the above object, a cooling device for a superconductor cooling container according to an embodiment of the present invention includes: an inner container disposed inside the outer container, the superconductor being immersed in a liquid coolant in the inner container; a freezer disposed outside the outer container and generating cool air; and a very low temperature maintaining device connected to the freezer to maintain the interior of the inner container in a very low temperature state.
The extremely low temperature holding device is a heat transfer part detachably provided on the periphery of the inner vessel in a surface contact manner.
Characterized in that the heat transfer part comprises: a plurality of setting surface parts formed on the periphery of the inner container in a mode of setting intervals; a plurality of heat transfer members attached to the installation surface portion and transferring the cold air received from the freezer to the inner container; a fastening part detachably fastening the heat transfer member to the inner container; and a flexible member thermally connecting the heat transfer members to each other.
Wherein the setting surface portion is formed into a plane by a plane processing, the heat transfer member includes a copper block, and the flexible member includes a flexible copper woven mesh.
Characterized in that a contact force between the heat transfer member and the setting face portion is determined by adjusting a fastening force of the fastening portion.
Characterized in that the fastening portion comprises: a bolt member attached to the installation surface portion; a plurality of insertion hole portions formed in the heat transfer member; and a nut member fastened to the bolt member inserted into the insertion hole and configured to bring the heat transfer member into close contact with the installation surface portion.
Wherein the flexible member is bonded to the heat transfer member by a bonding portion.
Characterized in that the joint comprises: a through hole portion formed in the flexible member; and a coupling member inserted into the through hole and coupled to the heat transfer member.
In addition, in order to achieve the above object, an inner container of a cooling device for a superconductor cooling container according to another embodiment of the present invention includes: an upper body formed in a tube shape opened in an up-down direction; a lower body having an upper opening and a lower portion sealed; and a middle body formed in a pipe shape connecting the upper body and the lower body, wherein a cooling zone of the cryogenic temperature maintaining device is provided on an outer circumferential surface of the middle body.
Characterized in that the intermediate body comprises a body plate of regular polygonal shape, the planar portions of the body plate having the same thickness irrespective of position.
The main body panel is formed by repeatedly bending a rectangular steel plate several times at predetermined intervals along a longitudinal direction and welding both ends of the steel plate to each other.
The flat surface portion is welded with a plurality of stud bolts.
Wherein welding plates for securing a welding area of the upper and lower bodies are welded to upper and lower ends of the body plates.
The welding plate is formed in a flat ring shape, the outer peripheral surface of the welding plate is formed in a regular polygonal shape that is identical to and coincident with the outer side surface of the body plate, and the inner peripheral surface of the welding plate is formed in a circular shape and protrudes inward in the radial direction than the inner side surface of the body plate.
The cooling device is characterized in that a cooling belt is arranged on the outer periphery of the main body plate.
The cooling belt is characterized by comprising a plurality of copper blocks and flexible joints connecting the plurality of copper blocks.
The copper block is a flat rectangular plate, bolt holes the same in number as a plurality of stud bolts provided in a plane portion of the main body plate are formed in the copper block, the copper block is tightly attached to the plane portion of the main body plate in a surface contact manner as a structure in which the stud bolts are inserted into the bolt holes, and nuts are fastened to the stud bolts.
ADVANTAGEOUS EFFECTS OF INVENTION
In the cooling device for a superconductor cooling container according to the present invention, a plurality of installation surface portions are formed on the periphery of an inner container by a surface processing, a plurality of heat transfer members are respectively installed on the installation surface portions, and a copper flexible member is used to connect the heat transfer members to each other, thereby uniformly transferring cold air of a freezer to an inner container, thereby omitting the conventional copper tape, saving the manufacturing cost, and easily confirming the contact state and the management quality of the heat transfer members.
In the cooling device for a superconductor cooling vessel according to the present invention, the intermediate body for installing the cryogenic temperature maintaining device, i.e., the cooling zone, is separately manufactured by bending the steel sheet, thereby ensuring uniform cooling performance over the entire circumferential periphery, reducing the difficulty of work and improving workability, and saving the manufacturing time and cost.
Drawings
Fig. 1 is a perspective view of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 2 is a perspective view showing an inner container of the cooling device for a superconductor cooling container according to one embodiment of the present invention.
Fig. 3 is an assembled perspective view showing a heat transfer part in detail in an inner container of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 4 is an exploded perspective view of a heat transfer part in an inner container of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 5 is a plan view of an installation surface portion formed on a peripheral surface of an inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention.
Fig. 6 is a view showing a state in which a heat transfer member is provided on an installation surface of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 7 is a diagram showing a state in which a flexible member is bonded to a heat transfer member of an inner container of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 8 is a diagram showing a state in which a freezer installation member is attached to a heat transfer member of an inner container of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 9 is an exploded view of an inner container of the cooling device for a superconductor cooling container according to one embodiment of the present invention.
Fig. 10 is a front view of a main body plate as one component of an intermediate body of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 11 is a plan view of a main body plate as one component of an intermediate main body of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 12 is a plan view of a fusion-bonded plate as one component of an intermediate body of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
Fig. 13 is a plan view of an intermediate body of a cooling device for a superconductor cooling container according to an embodiment of the present invention.
FIG. 14 is a view showing an assembled state of a cooling tape of the cooling device for a superconductor cooling container according to one embodiment of the present invention.
Detailed Description
Hereinafter, a cooling device for a superconductor cooling container according to an embodiment of the present invention will be described with reference to the drawings.
In this process, the thickness of lines or the size of constituent elements shown in the drawings may be exaggerated in consideration of clarity and convenience of description. Also, the terms described later are terms defined in consideration of functions in the present invention, and may be changed according to the intention or practice of a user or an operator. Therefore, the definitions of these terms should be determined based on the contents throughout the specification.
Fig. 1 is a perspective view of a cooling device for a superconductor cooling container according to an embodiment of the present invention, fig. 2 is a perspective view showing an inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention, fig. 3 is an assembled perspective view of a heat transfer part in the inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention, fig. 4 is an exploded perspective view of the heat transfer part in the inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention, fig. 5 is a state view in which an installation surface part is processed on a peripheral plane of the inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention, fig. 6 is a state view in which a heat transfer member is installed on the installation surface part of the cooling device for a superconductor cooling container according to the embodiment of the present invention, fig. 7 is a state view in which a flexible member is bonded to the heat transfer member of the inner container of the cooling device for a superconductor cooling container according to the embodiment of the present invention, FIG. 8 is a view showing a state in which a freezer installation member is attached to a heat transfer member of an inner container of a cooling device for a superconductor cooling container according to one embodiment of the present invention, FIG. 9 is an exploded view of an inner container of a cooling device for a superconductor cooling container according to an embodiment of the present invention, FIG. 10 is a front view of a main body plate as one of constituent elements of an intermediate body of a cooling device for a superconductor cooling container in accordance with one embodiment of the present invention, FIG. 11 is a plan view of a main body plate as one of constituent elements of an intermediate body of a cooling device for a superconductor cooling container according to an embodiment of the present invention, FIG. 12 is a plan view of a welded plate as one of constituent elements of an intermediate body of a cooling device for a superconductor cooling container in accordance with an embodiment of the present invention, FIG. 13 is a plan view of an intermediate body of a cooling device for a superconductor cooling container in accordance with an embodiment of the present invention, FIG. 14 is a view showing an assembled state of a cooling tape of the cooling device for a superconductor cooling container according to one embodiment of the present invention.
Referring to fig. 1 to 8, a cooling device for a superconductor cooling container according to an embodiment of the present invention includes an outer container 10, an inner container 200, a freezer 300, and a cryogenic temperature holding device (not shown).
The outer container 10 is provided with a heat insulating material. The outer container 10 is disposed at a predetermined interval from the peripheral edge of the inner container 200 so as to keep the inner container 200 insulated.
The inner container 200 is provided inside the outer container 10, and the superconductor is immersed in a liquid coolant. The superconductor is a conductor that generates a superconducting phenomenon in which resistance is close to zero (0) at a very low temperature, and has a property that a magnetic field cannot enter the inside thereof and pushes the magnetic field inside thereof also to the outside, thereby generating a magnetic levitation phenomenon suspended on the magnet.
The freezer 300 is provided outside the outer container 10 and generates cold air. The freezer 300 generates cold air and transfers the cold air uniformly to the peripheral edge of the inner container 200 in the circumferential direction through the heat transfer part 400, thereby uniformly transferring the cold air to the upper portion of liquid nitrogen as a liquid coolant stored in the inner container 200, i.e., a nitrogen gas tank, so that the superconductor is maintained in an extremely low temperature state.
The cryogenic temperature maintaining apparatus maintains the interior of the inner vessel 200 in a cryogenic state by transferring uniform cold air to the peripheral edge of the inner vessel 200 in the circumferential direction. In an embodiment of the present invention, the very low temperature maintaining means may be a heat transfer part 400. Hereinafter, the description will be made on the premise that the cryogenic temperature maintaining device is the heat transfer unit 400.
The heat transfer part 400 is connected to the freezer 300 and detachably provided at the peripheral edge (outer circumference) of the inner container 200 in a surface contact manner.
The heat transfer part 400 includes: a plurality of setting surface parts 410 formed on the periphery of the inner container 200 with a set interval; a plurality of heat transfer members 420 attached to the installation surface 410 and transferring the cold air received from the freezer 300 to the inner container 200; a fastening part 430 detachably fastening the heat transfer member 420 to the inner container 200; and a flexible member 440 thermally connecting the heat transfer members 420 to each other.
The setting surface portion 410 is formed into a flat surface by a flat surface processing. The set surface portion 410 may be formed flat by facing using a milling operation.
The heat transfer member 420 includes a copper block.
The flexible member 440 may comprise a flexible copper mesh grid.
In addition to the copper material, any metal material excellent in heat transfer efficiency may be applied to the heat transfer member 420 and the flexible member 440.
The heat transfer member 420 is characterized in that a contact force between the heat transfer member 420 and the setting face portion 410 is determined by adjusting a fastening force of the fastening portion 430.
The heat transfer efficiency of the heat transfer member 420 may be improved as the close adhesion force, which increases as the fastening force (torque) of the fastening portion 430 increases, is increased.
A setting member 600 for connecting with the freezer 300 is provided at a side of the heat transfer member 420. The setting member 600 is formed in a variable manner into various shapes, thereby allowing the cold air to be efficiently transferred from the freezer 300 to the heat transfer member 420.
The fastening portion 430 includes: a bolt member 432 attached to the installation surface portion 410; a plurality of insertion hole parts 434 formed at the heat transfer member 420; and a nut member 436 fastened to the bolt member 432 inserted into the insertion hole 434, and bringing the heat transfer member 420 into close contact with the installation surface portion 410.
The bolt member 432 may include a stud bolt (stud bolt).
The flexible member 440 is characterized by being coupled with the heat transfer member 420 by the coupling part 500.
The joint 500 includes: a through hole portion 510 formed in the flexible member 440; and a coupling member 520 inserted into the through hole 510 and coupled to the heat transfer member 420.
The coupling member 520 may include a bolt or a screw.
When the coupling member 520 is used to couple the flexible member 440 to the heat transfer member 420, the coupling member 520 is fastened to the nut member 436 of the heat transfer member 420 or to the screw hole formed in the heat transfer member 420, and thus, the flexible member 440 can be uniformly thermally connected to the heat transfer member 420.
Hereinafter, the operation and effect of the cooling device for a superconductor cooling container according to one embodiment of the present invention will be described with reference to the drawings.
The installation surface portions 410, which are formed into a plurality of flat surfaces by milling, are formed at predetermined intervals in the circumferential direction on the peripheral edge (outer periphery) of the inner container 200, and the plurality of bolt members 432 are fixed to the installation surface portions 410 by welding.
Next, an insertion hole portion 434 is formed in a position of the heat transfer member 420 made of a copper block corresponding to the bolt member 432, the bolt member 432 is inserted into the insertion hole portion 434, and the heat transfer member 420 is fastened with an appropriate torque using the nut member 436, thereby enabling the heat transfer member 420 to be closely attached to the installation surface portion 410.
In the related art, since the copper tape is provided in a circular shape on the peripheral edge of the inner container by welding or soldering, it is difficult to confirm the welding state and manage the quality, and on the contrary, in the present invention, since the contact force of the heat transfer member 420 to the installation surface portion 410 can be adjusted by the coupling of the bolt and the nut, the quality can be easily managed.
Then, the flexible member 440 and the heat transfer member 420 may be uniformly thermally connected by inserting the coupling member 520 into the through hole part 510 of the flexible member 440 and coupling with the heat transfer member 420.
The installation work is finished by installing the installation member 600 on the outer surface of the heat transfer member 420 and connecting the freezer 300.
In this set state, when the freezer 300 is operated, generated cold air is transferred to the heat transfer member 420 via the set member 600 and is maintained in a uniform thermal connection state with the other heat transfer member 420 by the flexible member 440, whereby the cold air is transferred to the inside of the inner container 200 via the outer side surface thereof, so that the superconductor soaked in liquid nitrogen can be maintained in a very low temperature state inside the inner container 200.
Therefore, the cooling apparatus for a superconductor cooling container according to an embodiment of the present invention forms a plurality of installation surface portions on the periphery of the inner container by means of a planar process, and respectively installs a plurality of heat transfer members on the installation surface portions, and connects the heat transfer members to each other using a copper flexible member, thereby uniformly transferring cold air of the refrigerator to the inner container, thereby making it possible to omit the conventional copper tape and save the manufacturing cost, and to easily confirm the contact state and the management quality of the heat transfer members.
In another embodiment of the present invention, the cryogenic cooling device of the cooling device for the superconductor cooling container may be a cooling tape 60. That is, the inner vessel can be maintained in a very low temperature state by the cooling belt 60. Hereinafter, the description will be made on the premise that the cryogenic cooling device is the cooling zone 60.
As shown in fig. 9, the inner container 200 of the present invention is separately constructed of a lower body 210, a middle body 100, and an upper body 220.
In the inner container 200, the lower body 210 constitutes a lower portion of the portion where the cooling belt 60 is provided and has a cylindrical shape, and a lower end portion of the lower body 210 is closed and an upper end portion thereof is opened.
The upper body 220 is a cylinder having the same material, diameter and thickness as the lower body 210, and the upper body 220 constitutes an upper portion of the installation portion of the cooling belt 60 in the inner container 200.
In the inner container 200, the intermediate body 100 corresponds to a portion for installing the cooling belt 60 as a cryogenic cooling device, and constitutes a wall body of a partial section in the vertical direction of the inner container 200. A freezer 300 is provided at one side of the inner container 200, and a cooling head 41 of the freezer 300 is connected to the cooling belt 60. Cooling belt 60 is provided at the periphery of the outer peripheral surface of inner container 200. Accordingly, the heat inside the inner container 200 is transferred to the cooling head 41 of the freezer 300 via the cooling belt 60 and removed, whereby the liquid nitrogen inside the inner container 200 is maintained in a liquid state, thereby enabling the superconductor module to be maintained in an ultra-low temperature state.
The intermediate body 100 includes: a main body plate 110; a welding plate 120 installed above and below the main body plate 110; and a plurality of studs 130 disposed on the side of the main body plate 110.
As shown in fig. 10 and 11, the main body plate 110 is a pipe (pipe) -shaped structure having a regular polygonal planar shape. Fig. 11 shows an example of a regular dodecagon shape in which the number of the flat portions 111 is 12, but the number of the flat portions 111 may be changed as appropriate depending on the size of the inner container 200.
The main body plate 110 is manufactured by bending a rectangular steel plate having a long length a plurality of times and welding both ends thereof to each other. That is, the main body plate 110 is originally a flat plate shape, and is repeatedly bent at predetermined intervals along the longitudinal direction to form a plurality of flat surface portions 111. A corner portion 112 is formed between the flat surface portion 111 and the flat surface portion 111, and the size of the inner angle of the corner portion 112 is the same for all corner portions 112.
As described above, the respective plane parts 111 of the body plate 110 maintain the plane state of the original steel plate as they are, and thus the flatness and roughness are very excellent compared to the related art in which the plane is processed by cutting the surface of a circular pipe.
Further, as shown, each planar segment 111 has the same thickness throughout the lateral direction without variation in thickness, which is the same in all planar segments 111.
Accordingly, the main body plate 110 has the same thickness throughout the circumferential direction, so that the middle body 100 has the same heat conductive performance in the radial direction across the circumferential direction.
A plurality of studs 113 are provided on the outer surface of the flat portion 111. The stud bolt 113 is fixed to the main body plate 110 by welding one end portion thereof to the flat surface portion 111. Fig. 10 shows an example in which 2 rows and 3 columns of 6 stud bolts 113 are provided on one flat surface portion 111, but the size of the copper block 61 (see fig. 14) of the cooling belt 60 may be appropriately changed in consideration of the size.
The upper and lower bodies 220 and 210 are connected to the upper and lower ends of the body panel 110 in a welding manner, but the welding plates 120 are welded to the upper and lower ends of the body panel 110 in advance in order to secure a sufficient bonding area, respectively.
As shown in fig. 12, the welding plate 120 has a planar circular ring shape as a flat plate of the same material as the main body plate 110. More specifically, the outer peripheral surface 121 of the fusion splice plate 120 is formed in the same regular polygonal shape as the body plate 110, and the inner peripheral surface 122 is formed in a circular shape.
The inner peripheral surface 122 of the welding plate 120 protrudes radially inward beyond the inner surface of the main body plate 110, and thus not only can a sufficient welding area be secured, but also the structural rigidity of the main body plate 110, that is, the intermediate body 100, can be improved.
The fusion splice plate 120 of this shape may be fabricated by laser cutting (cutting) a steel plate.
The distance between the mutually opposing flat portions in the outer peripheral surface 121 of the welding plate 120 is the same as the distance between (the outer side surfaces of) the mutually opposing flat portions 111 in the main body plate 110.
Fig. 13 shows a state where the welding plate 120 is fusion-bonded to the upper end of the main body plate 110, the outer peripheral surfaces of the main body plate 110 and the welding plate 120 are precisely aligned with each other, and in the inner peripheral surface (shown by a dotted line), the inner peripheral surface 122 of the welding plate 120 protrudes more inward in the radial direction than the inner peripheral surface of the main body plate 110.
The other welding plate 120 is also welded to the lower end of the main body plate 110 in the same manner, thereby completing the production of the intermediate body 100.
As described above, the ring-shaped fusion-spliced plates 120 are installed at the upper and lower ends of the main body plate 110, so that the main body plate 110 can more firmly respond to a lateral external force. That is, the structural rigidity of the intermediate body 100 can be improved by the plurality of welding plates 120.
Then, as shown in fig. 9, the upper body 220 and the lower body 210 are welded to the upper end and the lower end of the middle body 100, respectively, thereby completing the fabrication of the inner container 200.
At this time, the welding areas of the upper body 220 and the lower body 210 can be sufficiently secured by the plurality of welding plates 120 provided at the upper end and the lower end of the body plate 110, so that the upper body 220, the middle body 100, and the lower body 210 are firmly welded to each other, and the inner container 200 can have sufficient pressure-resistant rigidity.
Fig. 14 shows a state where a cooling belt 60 is provided on the outer peripheral surface of the intermediate body 100. The cooling belt 60 includes a plurality of copper blocks 61 and a flexible joint 62 connecting adjacent ones of the plurality of copper blocks 61 to each other.
The copper block 61 is a rectangular flat plate having a predetermined thickness, and one copper block 61 is attached to each flat surface portion 111 of the main body plate 110. To this end, the copper block 61 is formed with the same number of bolt holes as the number of stud bolts 113 of the main body plate 110, and the copper block 61 is tightly attached to the flat surface portion 111 of the main body plate 110 in a state where the stud bolts 113 are inserted into the bolt holes, and then nuts are fastened to the stud bolts 113 so that the copper block 61 is fixed to the main body plate 110 in a state where it is tightly attached to the flat surface portion 111 in a surface contact manner.
Then, a plurality of copper blocks 61 adjacent to each other are connected by flexible joints 62. The flexible joint 62 is made of the same copper material as the copper block 61 and is connected in a structure in which a contact area is as large as possible so as to smoothly achieve heat transfer with the copper block 61. Since the structure of the flexible joint 62 itself is not an object of the present invention, detailed description is omitted.
Although it has been described that the cooling band 60 is provided after the inner container 200 is manufactured, it is a matter of course that the operation of providing the cooling band 60 may be performed in a separate state before the middle body 100 is welded between the upper and lower bodies 220 and 210. In this case, since the work of installing the cooling belt 60 is performed while only the intermediate body 100 is handled, there is an advantage that the work can be performed more easily than the case of installing the cooling belt 60 while handling the inner container 200.
As described above, cooling band 60 provided on the outer surface of inner container 200 is connected to cooling head 41 of freezer 300 by a connecting member made of the same copper material. Accordingly, heat exchange is formed between the liquid nitrogen inside the inner container 200 and the cooling head 41 of the freezer 300, thereby enabling the temperature of the liquid nitrogen to be continuously maintained in a very low temperature state that can maintain the superconductor module in a superconducting state.
The operation and effect of the present invention will be described below.
As described above, the inner container 200 of the present invention is manufactured by separately manufacturing the middle body 100 for installing the cooling band 60 and the upper body 220 and the lower body 210 based on the middle body 100, and then welding them to each other.
The main body plate 110, which is a main component of the intermediate body 100, is manufactured by bending a long rectangular steel plate several times at predetermined intervals, and thus, a plurality of flat surface portions 111 between a plurality of bending lines, i.e., corner portions 112, are maintained in a flat state of the steel plate as a raw material, and thus, not only have excellent flatness and roughness, but also the entire flat surface portions 111 have the same thickness.
Therefore, the copper block 61 of the cooling belt 60 can be attached to the flat surface portion 111 in a very good surface contact state, so that heat transfer between the liquid nitrogen with the intermediate body 100 and the cooling belt 60 as a medium and the cooling head 41 of the freezer 300 can be smoothly achieved, and cooling performance of the inner container 200 can be improved.
In addition, since the flat surface parts 111 have the same thickness regardless of their positions, they have uniform thermal conductivity regardless of their positions, and since such flat surface parts 111 are provided in the entire circumferential direction of the intermediate body 100, it is possible to ensure uniform cooling performance over the entire circumference of the inner container 200. This means that the entire superconducting wire of the superconductor module can maintain a uniform superconducting state regardless of the position within the inner vessel 200, thereby enabling further stabilization and improvement of the operating performance of the superconducting current limiter.
Further, since the flat surface portion 111 of the main body plate 110 is formed by bending a flat plate material, the work itself is easier than the conventional technique of machining a flat surface by directly cutting the outer surface of the low-temperature container. Therefore, the inner container 200 can be manufactured more easily and at a lower cost.
In addition, the thickness of the flat surface portion 111 of the main body plate 110 is the same as a whole, so that it is not necessary to precisely consider welding heat according to positions in order to prevent deformation of the flat surface portion 111 when welding the stud bolts 13, and therefore, the work can be made easier and can be performed more quickly.
Further, in welding the stud bolts 13, welding is performed on the intermediate body 100 having a relatively small size and a relatively light weight, unlike the conventional case in which welding is performed in the completed state of the inner container 200, and therefore, the work is simplified.
As described above, the overall operation of the manufacturing process of the inner container 200 is facilitated and the time consumption is reduced, so that the manufacturing cost is reduced.
As described above, in the cooling device for a superconductor cooling container according to the embodiment of the present invention, the copper tape of the related art is omitted, and the plurality of installation surface portions and the heat transfer member are provided on the periphery of the inner container, or the inner container is divided and the cooling tape is provided, whereby the cold air of the refrigerator is uniformly transferred to the inner container, and the quality control can be easily performed. While the invention has been described with reference to the embodiments shown in the drawings, which are intended to be illustrative only, it is to be understood that various changes and equivalent other embodiments may be made therein by one of ordinary skill in the art.
Therefore, the true technical scope of the present invention should be determined by the appended claims.
Claims (17)
1. A cooling apparatus for a superconductor cooling container, comprising:
an inner container arranged inside the outer container, wherein the superconductor is soaked in the liquid coolant in the inner container;
a freezer disposed outside the outer container and generating cool air; and
and a very low temperature maintaining device connected to the freezer and maintaining the inside of the inner container in a very low temperature state.
2. The cooling apparatus for a superconductor cooling container as set forth in claim 1,
the extremely low temperature holding means is a heat transfer part detachably provided at a peripheral edge of the inner vessel in a surface contact manner.
3. The cooling apparatus for a superconductor cooling container as set forth in claim 2,
the heat transfer portion includes:
a plurality of setting surface parts formed on the periphery of the inner container in a mode of setting intervals;
a plurality of heat transfer members attached to the setting surface portion and transferring cool air received from the freezer to the inner container;
a fastening part detachably fastening the heat transfer member to the inner container; and
a flexible member thermally connecting the heat transfer members to each other.
4. The cooling apparatus for a superconductor cooling container as set forth in claim 3,
the setting surface portion is formed into a flat surface by a flat processing,
the heat transfer member includes a copper block,
the flexible member comprises a flexible copper mesh grid.
5. The cooling apparatus for a superconductor cooling container as set forth in claim 3,
the contact force between the heat transfer member and the setting face portion is determined by adjusting the fastening force of the fastening portion.
6. The cooling apparatus for a superconductor cooling container as set forth in claim 3,
the fastening portion includes:
a bolt member attached to the installation surface portion;
a plurality of insertion hole portions formed in the heat transfer member; and
and a nut member that is fastened to the bolt member inserted into the insertion hole to bring the heat transfer member into close contact with the installation surface portion.
7. The cooling apparatus for a superconductor cooling container as set forth in claim 3,
the flexible member is bonded to the heat transfer member by a bonding portion.
8. The cooling apparatus for a superconductor cooling container as set forth in claim 7,
the joint portion includes:
a through hole portion formed in the flexible member; and
and a coupling member inserted into the through hole and coupled to the heat transfer member.
9. The cooling apparatus for a superconductor cooling container as set forth in claim 1,
the very low temperature maintaining means comprises a cooling belt,
the inner container includes:
an upper body formed in a tube shape opened in an up-down direction;
a lower body having an upper opening, a lower portion of the lower body being closed; and
a middle body formed in a pipe shape and connected between the upper body and the lower body,
the cooling belt is provided on an outer peripheral surface of the intermediate body.
10. The cooling apparatus for a superconductor cooling container as set forth in claim 9,
the middle body includes a body plate having a regular polygonal shape,
the planar portion of the main body plate has the same thickness regardless of its position.
11. The cooling apparatus for a superconductor cooling container as set forth in claim 10,
the main body panel is formed by repeatedly bending a rectangular steel plate several times at predetermined intervals along the longitudinal direction thereof and welding both ends of the steel plate to each other.
12. The cooling apparatus for a superconductor cooling container as set forth in claim 10,
a plurality of stud bolts are welded to the flat surface portion.
13. The cooling apparatus for a superconductor cooling container as set forth in claim 10,
welding plates for securing a welding area of the upper body and the lower body are welded to upper and lower ends of the body plates.
14. The cooling apparatus for a superconductor cooling container as set forth in claim 13,
the fusion plate is formed in a flat ring shape,
the outer peripheral surface of the welding plate is formed into the same regular polygon shape as the outer side surface of the main body plate,
the inner peripheral surface of the welding plate is formed in a circular shape and protrudes radially inward from the inner surface of the main body plate.
15. The cooling apparatus for a superconductor cooling container as set forth in claim 10,
the cooling belt is arranged on the outer periphery of the main body plate.
16. The cooling apparatus for a superconductor cooling container as set forth in claim 15,
the cooling belt comprises:
a plurality of copper blocks; and
and the flexible joints are used for connecting a plurality of copper blocks.
17. The cooling apparatus for a superconductor cooling container as set forth in claim 16,
the copper block is a flat rectangular plate material,
the copper block is formed with bolt holes the same in number as the plurality of stud bolts provided on the plane portion of the main body plate,
the copper block is tightly attached to the plane part of the main body plate in a surface contact mode by a structure that the stud bolt is inserted into the bolt hole,
and nuts are fastened on the stud bolts.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020190117295A KR102635696B1 (en) | 2019-09-24 | 2019-09-24 | Superconductor cooling vessel chiller |
| KR10-2019-0117295 | 2019-09-24 | ||
| KR10-2020-0088974 | 2020-07-17 | ||
| KR1020200088974A KR102696343B1 (en) | 2020-07-17 | Low temperature container of superconducting fault current limiter | |
| PCT/KR2020/012870 WO2021060831A1 (en) | 2019-09-24 | 2020-09-23 | Cooling apparatus for superconductor cooling container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114424004A true CN114424004A (en) | 2022-04-29 |
| CN114424004B CN114424004B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080065822.1A Active CN114424004B (en) | 2019-09-24 | 2020-09-23 | Cooling device for superconductor cooling container |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20220336123A1 (en) |
| CN (1) | CN114424004B (en) |
| WO (1) | WO2021060831A1 (en) |
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| KR20180083022A (en) * | 2017-01-11 | 2018-07-20 | 삼우플랜트(주) | Steel pole |
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| US5113102A (en) * | 1991-05-09 | 1992-05-12 | Huntington Mechanical Laboratories, Inc. | Rotary motion transmitter and heat treatment method for sealed chamber |
| WO2013060663A2 (en) * | 2011-10-24 | 2013-05-02 | Alstom Technology Ltd | Gas turbine |
| US10035081B2 (en) * | 2016-04-14 | 2018-07-31 | Capna Intellectual, Inc. | Methods to reduce chlorophyll co-extraction through extraction of select moieties essential oils and aromatic isolates |
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2020
- 2020-09-23 WO PCT/KR2020/012870 patent/WO2021060831A1/en active Application Filing
- 2020-09-23 US US17/763,519 patent/US20220336123A1/en active Pending
- 2020-09-23 CN CN202080065822.1A patent/CN114424004B/en active Active
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| JPH11195523A (en) * | 1997-12-26 | 1999-07-21 | Mitsubishi Heavy Ind Ltd | Superconducting coil device |
| CN1806153A (en) * | 2003-06-19 | 2006-07-19 | 美国超能公司 | Method and apparatus of cryogenic cooling for high temperature superconductor devices |
| CN2788100Y (en) * | 2005-03-24 | 2006-06-14 | 中国科学院理化技术研究所 | Superfluid helium pressurizing device |
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| KR20180083022A (en) * | 2017-01-11 | 2018-07-20 | 삼우플랜트(주) | Steel pole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114424004B (en) | 2023-10-20 |
| WO2021060831A1 (en) | 2021-04-01 |
| US20220336123A1 (en) | 2022-10-20 |
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